B J G
Super Poster
Lifetime VIP Member
Might be as simple as run on a low inflation pressure. Tired rear springs would also wear inside as would having it heavily loaded. They do tend to go into a negative camber position normally.It might be the rear are only slightly out on castor causing the wear unless 20k is pretty reasonable for 235 tyres?
If the rear alignment was out you'd have felt a tendency to go left or right on a bumpy road. The rear tries to dictate the direction, most noticeable on Fen type roller coaster surfaces when the front lifts.